167360domain: NAppears in sequencesn*10^5-1, n*10^5-3, n*10^5-7 and n*10^5-9 are all prime.at n=23A064979Expansion of e.g.f. (1+x)*(exp(x)-1)*(exp(x)-x)*(exp(x)-x^2/2).at n=10A383323